I too was frustrated by Mail.app's lack of a proper conversation view. Turns out, there's a setting to show messages you sent. In the "Viewing" section of Mail.

I too was frustrated by Mail.app's lack of a proper conversation view. Turns out, there's a setting to show messages you sent. In the "Viewing" section of Mail.app's preferences, enable "Include related messages". http://imgur.com/i5Eaq http://imgur.com/i5Eaq